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Phylum Mollusca, Class Bivalvia

Miocene. The very first bivalves that we find in the fossil record are tiny, but fully-formed bivalves, complete with two shells, a hinge, a ligament, and adductor muscle scars. Marine bivalve communities are relatively stable. Many species, from as early as the Miocene Epoch survive to the present.

Miocene. The very first bivalves that we find in the fossil record are tiny, but fully-formed bivalves, complete with two shells, a hinge, a ligament, and adductor muscle scars. Marine bivalve communities are relatively stable. Many species, from as early as the Miocene Epoch survive to the present.